The Exploration of Space |
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Pagina 22
Let us assume that what we are aiming at is the greatest possible final speed when all the bricks have been used up . It should be fairly obvious that this final speed depends on two factors only— ( 1 ) the speed with which the bricks ...
Let us assume that what we are aiming at is the greatest possible final speed when all the bricks have been used up . It should be fairly obvious that this final speed depends on two factors only— ( 1 ) the speed with which the bricks ...
Pagina 23
Is it possible for the trolley to carry so much propellant that it could finally travel twice as fast as the speed with which the bricks are thrown off ? This idea may at first seem a little startling , but it must be remembered that as ...
Is it possible for the trolley to carry so much propellant that it could finally travel twice as fast as the speed with which the bricks are thrown off ? This idea may at first seem a little startling , but it must be remembered that as ...
Pagina 33
The speed necessary to move in such an orbit near the bottom of the crater ( i.e , near the Earth's surface ( e ) ) is 18,000 m.p.h. , and this is called “ circular velocity ” . Other similar orbits are shown at ( f ) and ( g ) .
The speed necessary to move in such an orbit near the bottom of the crater ( i.e , near the Earth's surface ( e ) ) is 18,000 m.p.h. , and this is called “ circular velocity ” . Other similar orbits are shown at ( f ) and ( g ) .
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Cuprins
THE SHAPING OF THE DREAM | 1 |
THE EARTH AND ITS NEIGHBOURS | 9 |
THE ROCKET | 17 |
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